US2431170A - Method of making pieced sole blanks - Google Patents

Description

Nov. 115,194?u GARGAN 2,431,170

' METHOD 0F MAKING -PIECED SOLE vBLANKS Filed Jan. 5, 1946 RSN mwmok 2305, Cam fm ONCE Patented Nov. 18, 1947 UNITED STATES aimait Marilou or MAKING PIECED sollt: BLANS Joseph Gargan, rookline, Mwashassignprpf one T. Miller, Manchester, Mass.

Application January 3, 1946; Sial N: 638;"759

1 Claim.

My invention relates to pieced shoe soles 'and particularly to sole blanks of this character fabricated from scrap material left from sections of leather from which sole blanks have been produced by the stripper die method.

When this method is used, a section of leather across the hide is taken, of a width equal to the length of the blanks to be produced. On this section, a pair of cutting dies operate, of a contour and so spaced, as to produce the required blank. After the first blank is cut, the section of leather is moved to a position for cutting a second blank, the spacing being such that, between the first and second blank, a third blank is produced in reversed position, the cutting dies being so formed as lto produce the same contour on the intermediate blank as in the other two, produced by direct cutting.

As the width of the hide and the width of the blanks vary, there is always a fragment left at the end of operations on a section, and this fragment may have a cut outline made by either cutting die, according to conditions. The fragments left from a plurality of sections, are selected in pairs according as one or the other cutting dies has made the nal cut on the different sections. These elements are trimmed on a line parallel to a median line from heel to toe, and as will be described, are cemented together to form a sole blank.

While it is old in the art to fabricate a pieced sole, I do not know nor believe that a shoe sole has been fabricated from scrap material disposed lengthwise of the sole. In many cases, scrap material disposed crosswise of the sole has been used, but in the flexing of the sole incident to wear, there is a constant tendency to part the scrap sections at the joints, but with my invention the iiexing of the iinished sole is the same as the natural exing of a one piece sole, or one in which the forepart and shank are in one piece.

One object of my invention is to fabricate a pieced sole blank -from scrap left from the operations of the strip cutting method for cutting sole blanks, the elements used being cemented together longitudinally and the contour being the same as the one piece blank.

A second object is to provide a sole blank of this character in which suitable sole material other than leather may be cemented to and between the major elements of leather, to provide a wider blank, having the same contour as the one piece sole blank.

My invention consists in providing a pieced sole blank, fabricated from scrap leather left from the respective cutting dies used in the strip cutting method for cutting sole blanks, selected pairs being trimmed longitudinally on a line parallel with the median line of the sole blank from heel to toe, the contiguous edges being bevelled to supplementary angles, and cemented together or to an inserted section to form a pieced sole with the same outline as a one piece sole formed by the pair of cutters.

In the accompanying specification and claims and the drawings forming a part thereof, I have described and illustrated preferred forms of my invention.

In the drawings,

Fig. 1 is a diagram of a section of leather from which sole blanks are cut by the strip die method.

Fig. 2 shows a sole blank formed from the scrap leit from the operations of respective cutting dies.

Fig. 3 is an enlarged end view showing the manner in which the joints are made.

Fig. 4 shows a blank in which an insert of suitable scrap material is inserted to obtain the proper width of the blank.

Fig. 5 is an enlarged end view showing the :manner in which the elements are joined.

Fig. 6 is a blank similar to that shown in Fig. 4, in which a plurality of scrap sections are joined to form the insert.

Fig. 7 is an enlarged end view.

Fig. 8 is a section enlarged, on the line 8 8, Fig. 6.

Referring to the drawings,

In Fig. 1 is indicated a plurality of sole blanks as they are cut by the strip die method; the blank I0 is cut by the operation of two cutting dies properly spaced for the required sole blank; the strip of leather being moved to position shown at I I, another blank is cut. Between I0 and II a third blank is formed in a reversed position as the dies are so formed that this, I2 has the same contour as I 0 or I I. At the end of the strip the last operation of the dies leaves a scrap end I3. The cut may be from the cutting die which' formed the outline I5, or it may be the outline I6 formed by the other die, I3 depending on the width of the hide and the blank.

The result is that in a. run of sole blanks there will be a plurality of both patterns of scrap. These are selected in pairs, trimmed longitudinally on a line parallel with the median line from heel to toe; the straight edges formed in bevels to supplementary angles, as at 26, and cemented under pressure after the elements are made of i equal thickness.

Fig. 6 I have shown an insert fabricated from several pieces, I8, I9, 2U, joined in the manner described. Y

Other material than leather, such as rubber, composition and the like may be used for inserts. Having thus described myinvention, I' claim: A method for utilizing scrap from sole material on which strip cutting dies have operated,

in which end scrap fragments are selected in 20 pairs according to the outline left by the` respec- 4 tive right and left dies, are trimmed on contiguous edges on a line from heel to toe, retaining the outline left by respective dies, said edges being beveled to supplementary angles, and cemented to form the right and left' elements of a pleced sole blank.

JOSEPH GARGAN.

REFERENCES CTED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 101,399 Woodley Mar. 29, 1870 197,636 Hummel et al Nov. 27, 1877 FOREIGN PATENTS Number Country Date 141,652 Great Britain Apr. 22, 1920 85,668 Austria Sept. 26, 1921

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